package com.ht.reeducation.utils;


import org.apache.commons.lang3.time.DateFormatUtils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * 日期工具类, 继承org.apache.commons.lang.time.DateUtils类
 *
 * @author ThinkGem
 * @version 2014-4-15
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    public static final String PK_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
    public static final String UTC_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
    public static final String UTC_DATE_FORMAT2 = "yyyy-MM-dd HH:mm:ss";

    /**
     * 得到当前日期字符串 格式（yyyy-MM-dd）
     */
    public static String getDate() {
        return getDate("yyyy-MM-dd");
    }

    /**
     * 得到当前日期字符串 格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"
     */
    public static String getDate(String pattern) {
        return DateFormatUtils.format(new Date(), pattern);
    }

    /**
     * 得到日期字符串 默认格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"
     */
    public static String formatDate(Date date, Object... pattern) {
        String formatDate = null;
        if (pattern != null && pattern.length > 0) {
            formatDate = DateFormatUtils.format(date, pattern[0].toString());
        } else {
            formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");
        }
        return formatDate;
    }

    /**
     * 得到日期时间字符串，转换格式（yyyy-MM-dd HH:mm:ss）
     */
    public static String formatDateTime(Date date) {
        return formatDate(date, "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 得到当前时间字符串 格式（HH:mm:ss）
     */
    public static String getTime() {
        return formatDate(new Date(), "HH:mm:ss");
    }

    /**
     * 得到当前日期和时间字符串 格式（yyyy-MM-dd HH:mm:ss）
     */
    public static String getDateTime() {
        return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 得到当前年份字符串 格式（yyyy）
     */
    public static String getYear() {
        return formatDate(new Date(), "yyyy");
    }

    /**
     * 得到当前月份字符串 格式（MM）
     */
    public static String getMonth() {
        return formatDate(new Date(), "MM");
    }

    /**
     * 得到当天字符串 格式（dd）
     */
    public static String getDay() {
        return formatDate(new Date(), "dd");
    }

    /**
     * 得到当前星期字符串 格式（E）星期几
     */
    public static String getWeek() {
        return formatDate(new Date(), "E");
    }

    /**
     * 日期型字符串转化为日期 格式
     * { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm",
     * "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm",
     * "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm" }
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取过去的天数
     *
     * @param date
     * @return
     */
    public static long pastDays(Date date) {
        long t = new Date().getTime() - date.getTime();
        return t / (24 * 60 * 60 * 1000);
    }

    /**
     * 获取过去的小时
     *
     * @param date
     * @return
     */
    public static long pastHour(Date date) {
        long t = new Date().getTime() - date.getTime();
        return t / (60 * 60 * 1000);
    }

    /**
     * 获取过去的分钟
     *
     * @param date
     * @return
     */
    public static long pastMinutes(Date date) {
        long t = new Date().getTime() - date.getTime();
        return t / (60 * 1000);
    }

    /**
     * 转换为时间（天,时:分:秒.毫秒）
     *
     * @param timeMillis
     * @return
     */
    public static String formatDateTime(long timeMillis) {
        long day = timeMillis / (24 * 60 * 60 * 1000);
        long hour = (timeMillis / (60 * 60 * 1000) - day * 24);
        long min = ((timeMillis / (60 * 1000)) - day * 24 * 60 - hour * 60);
        long s = (timeMillis / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
        long sss = (timeMillis - day * 24 * 60 * 60 * 1000 - hour * 60 * 60 * 1000 - min * 60 * 1000 - s * 1000);
        return (day > 0 ? day + "," : "") + hour + ":" + min + ":" + s + "." + sss;
    }

    /**
     * 获取两个日期之间的天数
     *
     * @param before
     * @param after
     * @return
     */
    public static double getDistanceOfTwoDate(Date before, Date after) {
        long beforeTime = before.getTime();
        long afterTime = after.getTime();
        return (afterTime - beforeTime) / (1000 * 60 * 60 * 24);
    }

    public static Date tomorrow(Date today) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(today);
        calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + 1);
        return calendar.getTime();
    }

    public static Date MinutesAgo(Date day, int minutes) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(day);
        calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) - minutes);
        return calendar.getTime();
    }

    public static Date MinutesAfter(Date day, int minutes) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(day);
        calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) + minutes);
        return calendar.getTime();
    }

    public static Date yesterday(Date today) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(today);
        calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1);
        return calendar.getTime();
    }

    public static List<String> getMonthBetween(String minDate, String maxDate) throws Exception {

        ArrayList<String> result = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");//格式化为年月

        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();

        min.setTime(parseDate(minDate));
        min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);

        max.setTime(parseDate(maxDate));
        max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);

        Calendar curr = min;
        while (curr.before(max)) {
            result.add(sdf.format(curr.getTime()));
            curr.add(Calendar.MONTH, 1);
        }

        return result;
    }

    public static List<String> getYearBetween(String minDate, String maxDate) throws Exception {

        ArrayList<String> result = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy");//格式化为年月

        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();

        min.setTime(parseDate(minDate));
        min.set(min.get(Calendar.YEAR), 1, 1);

        max.setTime(parseDate(maxDate));
        max.set(max.get(Calendar.YEAR), 1, 2);

        Calendar curr = min;
        while (curr.before(max)) {
            result.add(sdf.format(curr.getTime()));
            curr.add(Calendar.YEAR, 1);
        }

        return result;
    }

    public static String dateTransformBetweenTimeZone(Date sourceDate, DateFormat targetFormatter,
                                                      TimeZone sourceTimeZone, TimeZone targetTimeZone) {
        Long targetTime = sourceDate.getTime() - sourceTimeZone.getRawOffset() + targetTimeZone.getRawOffset();
        return getTime(new Date(targetTime), targetFormatter);
    }

    public static String PKDateToUTC(Date pkDate) {
        DateFormat targetFormatter = new SimpleDateFormat(UTC_DATE_FORMAT);
        TimeZone srcTimeZone = TimeZone.getTimeZone("GMT+8");
        TimeZone destTimeZone = TimeZone.getTimeZone("UTC");
        return dateTransformBetweenTimeZone(pkDate, targetFormatter, srcTimeZone, destTimeZone);
    }

    public static String UTCDateToPK(Date utcDate) {
        DateFormat targetFormatter = new SimpleDateFormat(PK_DATE_FORMAT);
        TimeZone srcTimeZone = TimeZone.getTimeZone("UTC");
        TimeZone destTimeZone = TimeZone.getTimeZone("GMT+8");
        return dateTransformBetweenTimeZone(utcDate, targetFormatter, srcTimeZone, destTimeZone);
    }

    public static String PKDateStrToUTC(String pkDateStr) {
        Date pkDate = parseDate(pkDateStr, PK_DATE_FORMAT);
        DateFormat targetFormatter = new SimpleDateFormat(UTC_DATE_FORMAT);
        TimeZone srcTimeZone = TimeZone.getTimeZone("GMT+8");
        TimeZone destTimeZone = TimeZone.getTimeZone("UTC");
        return dateTransformBetweenTimeZone(pkDate, targetFormatter, srcTimeZone, destTimeZone);
    }

    public static String UTCDateStrToPK(String utcDateStr) {
        Date utcDate = parseDate(utcDateStr, UTC_DATE_FORMAT);
        DateFormat targetFormatter = new SimpleDateFormat(PK_DATE_FORMAT);
        TimeZone srcTimeZone = TimeZone.getTimeZone("UTC");
        TimeZone destTimeZone = TimeZone.getTimeZone("GMT+8");
        return dateTransformBetweenTimeZone(utcDate, targetFormatter, srcTimeZone, destTimeZone);
    }

    public static String getTime(Date date, DateFormat formatter) {
        return formatter.format(date);
    }


    public static Date parseDate(String dateStr, String formatterStr) {
        SimpleDateFormat sdf = new SimpleDateFormat(formatterStr);
        Date date = null;
        try {
            date = sdf.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;
    }

    /**
     * @param args
     * @throws ParseException
     */
}

